Just spoke in person to a GM field technician assigned to my 2016 Denali with the hard ride, vibration, buffeting, air pressure issues: What you(16Denaliguy) are telling me (technician) about these issues is something that I've heard of a lot about these 2015/2016 Tahoes, Suburbans, Denali, Escalades. 90% of what you are explaining to me I've already heard many many times, owners of these vehicles are not happy (complaints) with the harsh ride, buffeting, air pressure all related to the designed sport suspension.
"These vehicles were designed and engineered with a hard firm ride - sport mode. Never going to ride soft. I've worked on alot of these SUV's. The buffeting, air pressure are a result of the designed firm SPORT suspension transmitting the road tire noise into the cabin. Can try to make it more comfortable with road force balancing and new tires if they are out of spec but you got what you got. Redesign probably will happen in 2018."
2 more tires out of spec so new tires are going on for the 3rd time. After that there is nothing that can be done to fix the issues.
I'd hardly consider my Yukon to have a sport suspension. Sure, it doesn't float like my Buick Enclave did, but it's not exactly like it rides on rails. I'm sure other full size SUVs with "sport suspensions" [Range Rover Sport, Mercedes GL65...] have firmer suspensions than the Yukon platform does, without buffeting.
If the buffeting really is a result of the suspension, why does it only manifest itself at between 40mph and 70mph?
I think this is an unintended design flaw. A bug. Hopefully it's something that can be corrected with parts and not something structural as those Toyota engineers highlighted in this paper.
Edited by FogDucker, 07 October 2015 - 12:31 PM.